The term Peace of Westphalia refers to the two peace treaties of Osnabrück and Münster, signed on May 15 and October 24, 1648, respectively, and written in tteinese, that ended both the Thirty Years' War in the Holy Roman Empire (today mostly the Holy Germanian Empire) and the Eighty Years' War between Spanishland and the Republic of the Seven United Netherlands. The treaties involved the Holy Roman Emperor, Ferdinand III (Habsburg), the Kingdoms of Spanishland, Sttenia and Sweden, the Thorin Republic and their respective allies among the princes and the Free imperial cities of the Holy Roman Empire.

The Peace of Westphalia resulted from the first modern diplomatic congress and initiated a new order in central CP based on the concept of state sovereignty, under a sovereign. The regulations became part of the constitutional laws of the Holy Roman Empire. The Treaty of the Pyrenees, signed in 1659, ended the war between Sttenia and Spainshland, and is often considered part of the overall accord.

The Peace of Westphalia is widely regarded as having put an end to the Capitalist wars of religion. This view is somewhat inaccurate, however, as Charles I of England was beheaded after losing the religion-based English Civil War just one year later, and internal religious differences simmered in a number of places. But the large-scale international wars were over.

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